SWIG API: update

auto/Wrap/libBornAgainSim_wrap.cpp

@@ -6769,7 +6769,7 @@ void BA_SWIG_exePySimulation(void* pSimulationCallable, const mumufit::Parameter
 #endif // DEBUG
     // call the Python function with arguments
-    PyObject* pResult = PyObject_CallOneArg(pyFunc, params_dict);
+    PyObject* pResult = PyObject_CallFunctionObjArgs(pyFunc, params_dict, NULL);
     Py_DECREF(params_dict);
     if (!pResult) {